check-for-build.jenkinsfile

lib = library(identifier: "jenkins@20211123", retriever: legacySCM(scm))

pipeline {
    options {
        timeout(time: 5, unit: 'HOURS')
        buildDiscarder(logRotator(daysToKeepStr: '7'))
    }
    agent none
    environment {
        AGENT_X64 = 'Jenkins-Agent-AL2-X64-C54xlarge-Docker-Host'
    }
    triggers {
        parameterizedCron '''
            H/60 * * * * %INPUT_MANIFEST=2.3.0/opensearch-dashboards-2.3.0.yml;TEST_MANIFEST=2.3.0/opensearch-dashboards-2.3.0-test.yml;TARGET_JOB_NAME=distribution-build-opensearch-dashboards
            H/60 * * * * %INPUT_MANIFEST=2.3.0/opensearch-2.3.0.yml;TEST_MANIFEST=2.3.0/opensearch-2.3.0-test.yml;TARGET_JOB_NAME=distribution-build-opensearch
            H 1 * * * %INPUT_MANIFEST=3.0.0/opensearch-3.0.0.yml;TARGET_JOB_NAME=distribution-build-opensearch
            H 1 * * * %INPUT_MANIFEST=3.0.0/opensearch-dashboards-3.0.0.yml;TARGET_JOB_NAME=distribution-build-opensearch-dashboards
        '''
    }
    parameters {
        string(
            name: 'INPUT_MANIFEST',
            description: 'Input manifest under the manifests folder, e.g. 2.0.0/opensearch-2.0.0.yml.',
            trim: true
        )
        string(
            name: 'TEST_MANIFEST',
            description: 'Test manifest under the manifests folder, e.g. 2.0.0/opensearch-2.0.0-test.yml. Currently only applicable for distribution-build-opensearch job',
            trim: true
        )
        string(
            name: 'TARGET_JOB_NAME',
            description: 'Job to trigger if build has changed',
            trim: true
        )
    }
    stages {
        stage('detect docker image + args') {
            agent {
                docker {
                    label AGENT_X64
                    image 'alpine:3'
                    alwaysPull true
                }
            }
            steps {
                script {
                    dockerAgent = detectDockerAgent()
                }
            }
        }
        stage('trigger-build-if-needed') {
            agent {
                docker {
                    label AGENT_X64
                    image dockerAgent.image
                    args dockerAgent.args
                    alwaysPull true
                }
            }
            steps {
                script {
                    lock(resource: "CheckForBuild-${INPUT_MANIFEST}-${TARGET_JOB_NAME}", skipIfLocked: true) {
                        def sha = getManifestSHA(
                            inputManifest: "manifests/${INPUT_MANIFEST}",
                            jobName: "${TARGET_JOB_NAME}"
                        )
                        if (sha.exists) {
                            echo "Skipping, ${sha.path} already exists."
                        } else {
                            if (TARGET_JOB_NAME != 'distribution-build-opensearch' &&
                                TARGET_JOB_NAME != 'distribution-build-opensearch-dashboards') {
                                error "Job ${TARGET_JOB_NAME} is invalid"
                            }
                            build job: "${TARGET_JOB_NAME}", parameters: [
                            string(name: 'INPUT_MANIFEST', value: "${INPUT_MANIFEST}"),
                            string(name: 'TEST_MANIFEST', value: "${TEST_MANIFEST}")
                            ], wait: true

                            echo "Build succeeded, uploading build SHA for that job"
                            buildUploadManifestSHA(
                                inputManifest: "manifests/${INPUT_MANIFEST}",
                                jobName: "${TARGET_JOB_NAME}"
                            )
                        }
                    }
                }
            }
            post {
                always {
                    postCleanup()
                }
            }
        }
    }
    post {
        failure {
            node(AGENT_X64) {
                script {
                    publishNotification(
                        icon: ':warning:',
                        message: 'Failed checking for build to trigger',
                        credentialsId: 'jenkins-build-notice-webhook',
                        manifest: "${INPUT_MANIFEST}",
                        target_job_name: "${TARGET_JOB_NAME}"
                    )

                    postCleanup()
                }
            }
        }
    }
}